I purchased two of these on Rakuten, but my cat didn't use them at all, so I'm selling the unused one. It arrived compressed. It's supposed to expand when taken out of the bag, so I've been storing it in this state. I haven't kept it in a space where my cat goes. I will ship it via Yu-Packet Post, so I will package it to fit the size requirements. I will compress it again, but it should expand if you leave it out for a while or dry it in the sun.